Abstract
The motion and dimension of molecular nuclear wave packets produced by an ultrashort laser pulse are measured by Coulomb explosion induced by a delayed intense fs laser pulse. Two different continuum wave packets in ${\mathrm{I}}_{2}$ are observed as they move from an internuclear separation of $\ensuremath{\sim}7$ to $>100$ \AA{}. The ultimate spatial resolution is limited by the pulse duration of the probe laser. For 485 nm excitation of $B$-state wave packets the resolution limit is $\ensuremath{\sim}0.5$ \AA{}.
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